PEAK6
CIEN icon

PEAK6’s Ciena CIEN Stock Holding History

PEAK6’s Portfolio CIEN Stock Details CIEN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$2.94M Sell
6,000
-17,500
-74% -$8.92M 0.01% 1110
2026
Q1 		$9.12M Sell
23,500
-133,400
-85% -$40.8M 0.02% 619
2025
Q4 		$36.7M Sell
156,900
-231,000
-60% -$44.8M 0.07% 227
2025
Q3 		$56.5M Buy
387,900
+348,800
+892% +$35.5M 0.08% 184
2025
Q2 		$3.18M Sell
39,100
-133,400
-77% -$9.57M 0.01% 1198
2025
Q1 		$10.4M Sell
172,500
-392,200
-69% -$31M 0.02% 582
2024
Q4 		$47.9M Buy
+564,700
New +$40.5M 0.1% 166

Other funds holding CIEN

Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return

PEAK6's CIEN Position: Q2 2026 in Review

PEAK6 increased its Ciena (CIEN) stake by 1,735% in Q2 2026, buying an estimated $21.5M and bringing the position to 44,570 shares worth $21.9M. The position accounts for 0.05% of the portfolio, ranked #314.

PEAK6 first reported a position in CIEN in Q2 2025 and has held it in 5 quarters since. The position peaked at $30.3M in Q4 2025. 1,226 funds tracked by Wall St. Rank hold CIEN as of Q2 2026.

  • PEAK6 held 44,570 shares of Ciena worth $21.9M as of Q2 2026.
  • PEAK6 bought 42,141 Ciena shares in Q2 2026, an estimated $21.5M.
  • Ciena made up 0.05% of PEAK6's portfolio in Q2 2026, its #314 holding.
  • PEAK6 first reported a position in Ciena in Q2 2025 and has held it in 5 quarters since.
  • PEAK6's Ciena position peaked at $30.3M in Q4 2025.
  • 1,226 funds tracked by Wall St. Rank held Ciena as of Q2 2026.

Based on PEAK6's 13F filing for Q2 2026, filed 13 Aug 2026.